Cold War Intelligence
Title: David A. Hatch, "The Berlin Tunnel ::Part II: The Rivals," Cryptologic Almanac, March-April 2002, Top Secret/COMINT/X1.
Creator: David A. Hatch
Date in Source: March-April 2002
Subject: Berlin - SIGINT - Top Secret/COMINT/X1
Format: 4 p.
Note: NSA FOIA.